Connecting brass P-trap to ABS drain, without slip joint

[RuralAtlantic]

I'm trying to connect a 1-1/4" brass p-trap (for an exposed vanity) to the 1-1/2" ABS drain line. The challenge is that the wall that the drain is in is very shallow (about 2.5") and the pipe escutcheon/flange is not deep enough to cover an entire slip join, it is just deep enough to cover the exposed sanitary T join (see my 2nd pic). We are putting up 3/8" thick beadboard instead of drywall, so that won't add much more depth to work with.

In my ideal situation, I would replace the 1-1/2" sanitary T with one that reduces to 1-1/4" for the p-trap, then connect them with some sort of sealant, but I don't know, is there's anything that works with brass and ABS?

The top of this T goes to the vent for this sink.

Showing how little clearance there is. Here the escutcheon is flush against the ABS, and it's just in-line with the studs, meaning the beadboard would add 3/8" clearance.

 

[Plumber69]

I'm trying to connect a 1-1/4" brass p-trap (for an exposed vanity) to the 1-1/2" ABS drain line. The challenge is that the wall that the drain is in is very shallow (about 2.5") and the pipe escutcheon/flange is not deep enough to cover an entire slip join, it is just deep enough to cover the exposed sanitary T join (see my 2nd pic). We are putting up 3/8" thick beadboard instead of drywall, so that won't add much more depth to work with.

In my ideal situation, I would replace the 1-1/2" sanitary T with one that reduces to 1-1/4" for the p-trap, then connect them with some sort of sealant, but I don't know, is there's anything that works with brass and ABS?

The top of this T goes to the vent for this sink.
View attachment 73875

Showing how little clearance there is. Here the escutcheon is flush against the ABS, and it's just in-line with the studs, meaning the beadboard would add 3/8" clearance.
View attachment 73876

This should work

 

[Sponsor]

 

[RuralAtlantic]

This should work

Right, I know I could fall back to using a slip join and try to make sure it gets covered up nicely if the escutcheon is not deep enough, but I'm wondering if there's any sort of sealant product that would work for brass and ABS?

 

[wwhitney]

No, no sealant option. The part plumber69 mentioned (spigot trap adapter, spigot x SJ) is your lowest profile option. You can get a brass box escutcheon if necessary.

Cheers, Wayne

 

[Terry]

 

[RuralAtlantic]

Okay, thanks for the guidance everyone!

 

[RuralAtlantic]

I finished this project not long after my previous post, but thought I'd follow up with the result, which I'm pretty proud of. I was able to cut a cylinder of wood to slide over the slip join, so I could paint it the same colour as the wall. Now it's barely noticeable, which the wife was pleased about.